CScale, based in Palo Alto, exited stealth on Sept. 30, 2026, announcing $145 million in Series C funding. The startup is developing optical interconnect for AI scale-up, which it describes as the high-bandwidth, ultra-low-latency connections that allow accelerators to work together.
The new capital will go toward development and commercialization of the technology. CScale is positioning the interconnect for gigawatt-scale AI systems, suggesting the company is targeting the largest class of AI data center builds.
The announcement did not include details on customers, product availability, or the investors in the round. The funding is a notable signal for optical interconnect as AI clusters push toward larger scale.